Special Program for Technical Vocational 1ST GENERATION...

1

Special Program for

Technical Vocational

Education Industrial Technology

Electrical Installation and

Maintenance NC II

Quarter 1 – Module 2:

Layout and Install Rigid Non-

Metallic Conduit

9

________________________________________________________________________________________________________________________________________________________________Subject to further validation for IP compliance, this material is for first quarter use only. Circulation shall be limited to public schools within the jurisdiction of the Division of Cebu Province. LR-PIPCV

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Special Program for Technical Vocational Education Grade - 9

Alternative Delivery Mode

Quarter1 – Module2: Layout and Install Rigid Non-Metallic Conduit

First Edition, 2020

Republic Act 8293 section 176 states that: No copyright shall subsist in any work of the Government of the Republic of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for the exploitation of such work for a profit. Such an agency or office may, among other things. Impose as a condition the payment of royalties. Borrowed materials (i.e., songs, stories, poems, photos, brand names, trademarks, etc.) included in this book are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them. Published by the Department of Education Secretary: Leonor Magtolis Briones Undersecretary: Diosdado M. San Antonio

DEVELOPMENT TEAM OF THE MODULE

Writer : Andrez Melchor G. Zozobrado

Editor : Jose Garry R. Napoles

Reviewers : Analogie D. Destacamento

Chito R. Villacampa

Illustrator : Maribell J. Fuentes

Layout Artist : Maribell J. Fuentes

Management Team:

Schools Division Superintendent : Marilyn S. Andales

Assistant Schools Div. Superintendent : Leah B. Apao

Cartesa M. Perico

Ester A. Futalan

Chief Education Supervisor, CID : Mary Ann P. Flores

Education Program Supervisor, LRMDS : Isaiash T. Wagas

Education Program Supervisor, TLE : Jose Garry R. Napoles

Department of Education – Regional Office 7

Division of Cebu Province

Office Address : IPHO Bldg., Sudlon, Lahug, Cebu City, Philippines

Telefax : (032) 520-3216 – 520-3217; SDS Office: (032) 255 - 6405

E-mail Address : [email protected]

Bitoon National Vocational High School

Address : Bitoon, Dumanjug, Cebu

Telephone : (032) 471-8001

E-mail Address : [email protected]


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9

Special Program for

Technical Vocational

Education Industrial Technology

Electrical Installation and

Maintenance NC II

Quarter 1 – Module 2:

Layout and Install Rigid Non-

Metallic Conduit


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Key Message

For Educators:

Learning is a constant process. Amidst inevitable circumstances, the Department of

Education extends its resources and looks for varied ways to cater to your needs and to

adapt to the new system of Education as a fortress of the Learning Continuity Plan. One of

the probable solutions is the use of Teacher-made Educational Modules in teaching.

You are reading the Electrical Installation and Maintenance for Grade 9: First

Quarter Alternative Delivery Mode (ADM) Module on “Layout and Install Rigid Non-

Metallic Conduit” as written and found in the Competency-Based Curriculum –

Strengthened Technical-Vocational Education Program.

The creation of this module is an effort of competent trainers from Bitoon National

Vocational High School of the Department of Education-Cebu Province during this

pandemic period. In addition, this module is meticulously planned, organized, checked, and

verified by knowledgeable educators to assist you in imparting the lessons to the learners

while considering the physical, social, and economic restraints in the teaching process.

The use of the Teacher-Made Educational Module aims to surpass the challenges of

teaching in a new normal education set-up. Through this module, the students are given

independent learning activities, which embodies in the Most Essential Learning

Competencies based on the K-12 Curriculum Competencies, to work on in accordance with

their capability, efficiency, and time. Thus, helping the learners acquire the prerequisite 21st

Century skills needed with an emphasis on utmost effort in considering the whole well-being

of the learners.

As the main source of learning, it is your top priority to explain clearly how to use this

module to the learners. While using this module, learner’s progress and development should

be recorded verbatim to assess their strengths and weaknesses while doing the activities

presented independently in the safety of their homes. Moreover, you are anticipated to

persuade learners to comply and to finish the modules on or before the scheduled time.

For the Learners:

As a significant stakeholder of learning, the Department of Education researched and

explored innovative ways to address your needs with high consideration on social,

economic, physical, and emotional aspects of your well-being. To continue the learning

process, DepEd comes up with an Alternative Delivery mode of teaching using Teacher-

Made Educational Modules.

You are reading Electrical Installation and Maintenance for Grade 9: First

Quarter Alternative Delivery Mode (ADM) Module on “Layout and Install Rigid Non-

Metallic Conduit” as written and found in the Competency-Based Curriculum –

Strengthened Technical-Vocational Education Program.

This module is specially crafted for you to grasp the opportunity to continue learning

even at home. Using guided and independent learning activities, rest assured that you will


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be able to take pleasure as well as to deeply understand the contents of the lesson

presented, recognizing your capacity and capability in acquiring knowledge.

This module has the following parts and corresponding icons:

LEARNING OUTCOME

The first part of the module will keep you

on track on the Competencies,

Objectives, and Skills expected for you to

be developed and mastered. Some

reminders about the module are found in

here too.

This part aims to check your prior

knowledge of the lesson to take. If you

can get a perfect score and perform

competently the competency, you can

skip the module and proceed to the next

module. If not, continue to the next part.

This part helps you link the previous

lesson to the current one through a short

exercise/drill.

A brief discussion of the lesson can be

read in this part. It guides and helps you

unlock the lesson presented.

A comprehensive activities for

independent practice is in this part to

solidify your knowledge and skills of the

given topic. This can be a drill or

exercise or an activity.

This part of the module is used to

process your learning and understanding

of the given topic. It can be a series of

questions or an activity.

A transfer of newly acquired knowledge

and skills to a real-life situation is present

in this part of the module. This can be a

task sheet (used when doing simple

tasks), operation sheet (used when doing

or operating devices or a job sheet (used

in doing series of task for a specific job).

GENERALIZATION

Review lesson

INFORMATION SHEET

ACTIVITY SHEET

PERFORMANCE TASKS

PRE - ASSESSMENT


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This activity assesses your level of

mastery towards the topic.

This contains answers to all activities in

the module.

At the end of this module you will also find:

In using this module, keep a note of the fundamental reminders below.

1. The module is government-owned. Handle it with care. Unnecessary marks

are prohibited. Use a separate sheet of paper in answering all the given

exercises.

2. This module is organized according to the level of understanding. Skipping

one part of this module may lead you to confusion and misinterpretation.

3. The instructions are carefully laden for you to understand the given lessons.

Read each item cautiously.

4. This is a Home-Based class; your reliability and honor in doing the tasks and

checking your answers are a must.

5. This module helps you attain and learn lessons at home. Make sure to

comprehend the first activity before proceeding to the next one.

6. This module should be returned in good condition to your teacher/facilitator

once you completed it.

7. Answers should be written on a separate sheet of paper or notebook

especially prepared for TVE subjects.

If you wish to talk to your teacher/educator, do not hesitate to keep in touch with

him/her for further discussion. Know that even if this is a home-based class, your teacher is

only a call away. Good communication between the teacher and the student is our priority to

flourish your understanding of the given lessons.

We do hope that in using this material, you will gain ample knowledge and skills for

you to be fully equipped and ready to answer the demands of the globally competitive world.

We are confident in you! Keep soaring high!

References Printed in this part is a list of all reliable and valid

resources used in crafting and designing this module.

SELF – CHECK

ANSWER KEYS


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Good day d

Good day, dear learner!

This module is solely prepared for you to access and to acquire lessons befitted in

your grade level. The exercises, drills and assessments are carefully made to suit your level

of understanding. Indeed, this learning resource is for you to fully comprehend the “Layout

and Install Rigid Non-Metallic Conduit” independently, you are going to go through this

module following its proper sequence. Although you are going to do it alone, this is a guided

lesson and instructions/directions on how to do every activity is plotted for your convenience.

Using this learning resource, you are ought to “Layout and Install Rigid Non-

Metallic Conduit” as inculcated in the Competency-Based Curriculum – Strengthened

Technical-Vocational Education Program.

This module is composed of set of instructions for you to be guided in the activities

that you will perform later. Read and follow instructions properly, do not skip any parts and

perform each activity honestly. This module is intended for you finish within a week.

At the end of this module, you are expected to achieve the following objectives:

Identify the different PEC provisions in installing rigid non-metallic conduit.

Demonstrate tools/materials and equipments needed for installation are

prepared in line with job requirements.

Display responsibility and accountability by all times.

Display concern for others.

A. Directions: Identify what is being referred by the following sentence. Write your answer

on a separate sheet of paper.

1. Bends of rigid non-metallic conduit shall be so made that the conduit will not be damaged

and that the internal diameter of the conduit will not be effectively reduced.

2. Where conduit enters a box, fitting or other enclosure, a bushing or adapter shall be

provided to protect wires from abrasion unless the box, fitting or enclosure design

provides equivalent protection.

LEARNING OUTCOME

PRE- ASSESSMENT


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3. Rigid non-metallic conduit larger than 150 mm (160 mm) electrical trade size shall not be

used.

4. Rigid non-metallic conduit smaller than 15 mm (20 mm) electrical trade size shall not be

used.

5. Expansion fitting for rigid non-metallic conduit shall be provided to compensate for thermal

expansion and contraction.

6. Rigid non-metallic conduit shall be rigidly supported as indicated below

7. Joints between lengths of conduit and between conduit couplings, fittings and, boxes shall

be made with approved coupling and adapter. For water proofing, PVC cement should be

spread around the surfaces to be .joined together

8. Rough edges or burrs at the cut ends of non-metallic conduit shall be trimmed inside and

outside

I. Directions: Enumeration. Answer the following question below using separate sheet of

paper.

1-10. What are the different types of conduit fittings?

11-14. What are the different types of bend?

15-17. What are the different type of bend defects?

18-20. Give at least 3 important PPE in bending a PVC.

Rigid Non-Metallic Conduit (PVC)

Non-metallic conduits are electrical materials which are manufactured to be resistant

to moisture and chemical atmosphere. They are also manufactured to be flame retardant or

not easily burned. They are resistant to impact and crushing. They do not easily get out

shape by the heat. These conduits are classified according to the materials they are made

of. The most common ones are asbestos cement conduit, polyvinyl chloride, conduit and

high density polyethylene conduit.

The Philippine Electrical Code provides that rigid non-metallic conduit may be used

under the following conditions:

1. Concealed in floors, walls and ceilings 2. Direct earth burial or underground

REVIEW LESSON

INFORMATION SHEET


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300 mm in trench below 50mm thick concrete or equivalent

600 mm under streets, highways, roads, alleys, driveway and parking lots

460 mm under driveways and parking lots of single and two family dwelling units

460 mm under airport runways, including adjacent areas where trespassing is prohibited

3. In locations subject to severe corrosive influences 4. In locations where subject chemicals for which the materials are specifically

approved 5. Cinder fill 6. In wet locations, provided water is prevented from entering the conduit 7. In dry and damp locations

The Philippine Electrical Code prohibits the use of rigid non-metallic conduit under

the following conditions:

1. Hazardous (Classified) locations 2. Support of fixtures 3. Physically damaged location 4. Ambient temperature. Where subject to ambient temperatures in excess of 50oC

unless listed otherwise 5. Insulation temperature limitations. For conductors whose insulation temperature

limitations would exceed those for which the conduit is listed. 6. Theaters and similar locations.

INSTALLATION OF NON-METALLIC CONDUIT PEC REQUIREMENTS

1. TRIMMING. Rough edges or burrs at the cut ends of non-metallic conduit shall be trimmed inside and outside

2. JOINTS. Joints between lengths of conduit and between conduit couplings, fittings and, boxes shall be made with approved coupling and adapter. For water proofing, PVC cement should be spread around the surfaces to be .joined together

3. SECURING and SUPPORTS. Rigid non-metallic conduit shall be rigidly supported as indicated below

Table 3.47.1.8 Support of Rigid Nonmetallic Conduit

(Based on Philippine Electrical Code, 2000, Part I)

Conduit Size

[mm (mm)]*

Maximum Spacing

Between Supports (mm)

15 (20) – 25 (32)

32 (40) – 50 (63)

65 (75) – 80 (90)

90 (100) – 125 (135)

150 (160)

900

1500

1800

2100

2400

Disclaimer: The contents above are borrowed from STVEP CBC CBLM 2008 – Electrical Installation and Maintenance (EIM) made by Mr. Marino C. Cueto; Ms. Gina C, delos Santos; Dr. Corazon Echano; and Mr. Lemuel C. Valles, funded by the Department of Education.


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4. EXPANSION FITTINGS. Expansion fitting for rigid non-metallic conduit shall be provided to compensate for thermal expansion and contraction. .

5. MINIMUM SIZE. Rigid non-metallic conduit smaller than 15 mm (20 mm) electrical trade size shall not be used.

6. MAXIMUM. Rigid non-metallic conduit larger than 150 mm (160 mm) electrical trade size shall not be used.

7. BUSHING. Where conduit enters a box, fitting or other enclosure, a bushing or adapter shall be provided to protect wires from abrasion unless the box, fitting or enclosure design provides equivalent protection.

8. BENDS-HOW MADE. Bends of rigid non-metallic conduit shall be so made that the conduit will not be damaged and that the internal diameter of the conduit will not be effectively reduced.

Table 3.46.2.6 Radius of Conduit Bends

(Based on Philippine Electrical Code, 2000, Part I)

Size of Conduit

(mm) Conductors Without Lead Sheath

15

20

25

32

40

50

65

80

90

100

125

150

100

125

150

200

250

300

375

450

525

600

750

900

Disclaimer: The contents above are borrowed from STVEP CBC CBLM 2008 – Electrical Installation and Maintenance (EIM) made by Mr. Marino

C. Cueto; Ms. Gina C, delos Santos; Dr. Corazon Echano; and Mr. Lemuel C. Valles, funded by the Department of Education.


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TYPES OF PVC CODUIT FITTINGS

PVC Coupling PVC elbow

Adapter PVC Conduit Pipe

PVC 2G box LL Access Fitting

1 Inch Type T Condulet 1/2 Inch Type T PVC Condulet

3/4" Type LL PVC Access Fitting PVC Conduit Clamps




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http://www.amazon.com/CANTEX-INDUSTRIES-Female-Adapter/dp/B000BQM8TE/ref=sr_1_4/002-4672107-4323221?ie=UTF8&s=hi&qid=1210245854&sr=1-4http://www.amazon.com/gp/product/images/B000BQU3NW/sr=1-3/qid=1210245864/ref=dp_image_0/104-2417286-1942312?ie=UTF8&n=228013&s=hi&qid=1210245864&sr=1-3

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Identifying Different Types of Bend

The PVC or polyvinyl chloride rigid conduit is one of the most commonly used

conduits in electrical wiring installation today. Its preparation for installation is much easier

than the metallic rigid conduit. In preparing a non-metallic rigid conduit for installation, an

electrician needs to do cutting, heating and bending. Like in metallic rigid conduit offset

bends, 90o angle bends and other bends are also made on PVC rigid conduit. In making

bends on PVC rigid conduit, the electrician should see to it that the internal diameter of the

conduit is not reduced and damaged so that the capacity of the conduit to accommodate

maximum number of conductors will not be lessen and to facilitate easy pulling of

conductors.

Since PVC conduits are somewhat easier to bend than a rigid conduit, it likewise

requires patience as in any other type of conduit. It is first pre-heated over a fire or a heat

gun to a desired softness. Little by little, it is bent to its desired shape. When such is

attained, it is then hardened by soaking it to cold or lukewarm water or dampened with a wet

rag.

1. Elbow

2. Offset bend is less than 900

bend, it is used when the

conduit crosses and obstacle

or when the conduit is

entering an electrical box

.

3. Round saddle bend is used

when the conduit run across

circular objects like pipes.




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4. Square saddle bend is similar to round saddle, it is used when the conduit run across rectangular obstacles. Square saddle is just a combination of two offset bends.

Bend Defects

1. Burned

2. Kinks or groove

3. The diameter of the conduit is

greatly reduced due to improper

bending procedure.



Obstacl

e

Kinks


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I. Directions: Match the types of PVC conduit fittings in Column A to their descriptions in Column B. Write the letter of your answer in the space provided before each number. Use a separate sheet of paper.

Column A Column B

______1,

A. Adapter

______2.

B. PVC Conduit Clamps

_______3.

C. 1 inch type T Condulet

________4.

D. PVC Coupling

ACTIVITY SHEET

Disclaimer: The contents above are borrowed from STVEP CBC CBLM 2008 – Electrical Installation and Maintenance (EIM) made by Mr.

Marino C. Cueto; Ms. Gina C, delos Santos; Dr. Corazon Echano; and Mr. Lemuel C. Valles, funded by the Department of Education.


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________5.

E. PVC Conduit Pipe

________6.

F. LL Access Fitting

________7.

G. PVC Elbow

________8.

H. PVC 2G Box

________9.

I. ½ Inch Type T PVC Condulet

Disclaimer: The contents above are borrowed from STVEP CBC CBLM 2008 – Electrical Installation and Maintenance (EIM) made by Mr.

Marino C. Cueto; Ms. Gina C, delos Santos; Dr. Corazon Echano; and Mr. Lemuel C. Valles, funded by the Department of Education.


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http://www.amazon.com/CANTEX-INDUSTRIES-Female-Adapter/dp/B000BQM8TE/ref=sr_1_4/002-4672107-4323221?ie=UTF8&s=hi&qid=1210245854&sr=1-4

10

_______10.

J. ¾ Type LL PVC Access Fitting

``

ESSAY

Directions: Read and understand each item carefully. Write a 2-3 sentences possible for

the item that needs opinion or idea. Write your answer on a separate sheet of

paper.

a. Where and how can PVC electrical conduit be used?

b. Explain the different types of bend.

c. Explain the different types of bend defects.

d. Why do we need to use PPE in bending a PVC?

e. What is the purpose of the different types of conduit fittings?

Rubrics:

Criteria Score Rate

Exceptionally clear, thorough and comprehend explanation. 4

Generally clear and substantial explanation. 3

Lacks of clarity, partial or not comprehensive explanation. 2

Unclear, misunderstanding or serious misconception on the explanation. 1

Directions: Answer the following question below. Use a separate sheet of paper.

A. What are the following conditions that the Philippine Electrical Code provides that rigid

non-metallic conduit may be used?

GENERALIZATION

PERFORMANCE TASKS


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http://www.amazon.com/gp/product/images/B000BQU3NW/sr=1-3/qid=1210245864/ref=dp_image_0/104-2417286-1942312?ie=UTF8&n=228013&s=hi&qid=1210245864&sr=1-3

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B. What are the following conditions that the Philippine Electrical Code prohibits the use of

rigid non-metallic conduit?

A. Directions: Read the following sentences carefully. Write the complete word of your

answer on a separate sheet of paper.

1.It is a type of bend that is similar to round saddle, it is used when the conduit run across

rectangular obstacles

A. square saddle B. elbow C. offset bend D. round saddle

2. It is a type of bend that is used when the conduit run across circular objects like pipes.


3. It is a less than 90o bend, it is used when the conduit crosses an obstacle or when the

conduit is entering an electrical box


4. It s a type of bend defects that is caused by too much heat.

A. burned B. kink or groove C. offset bend D. diameter

5. It is a type of bend defects caused by a sudden bend.

A. burned B. Kink C. offset bend D. diameter

II. Directions: Write TRUE if the statement is correct and FALSE if the statement is not

correct. Use a separate sheet of paper for your answer.

1. Expansion fitting for rigid non-metallic conduit shall be provided not to compensate for

thermal expansion and contraction

2. Minimum size. rigid non-metallic conduit smaller than 10 mm (15 mm) electrical trade size

shall not be used.

3. Maximum. rigid non-metallic conduit larger than 200 mm (180 mm) electrical trade size

shall not be used.

4. Bushing where conduit enters a box, fitting or other enclosure, a bushing or adapter shall

be provided to protect wires from abrasion unless the box, fitting or enclosure design

provides equivalent protection.

5. Bends-how made bends of rigid non-metallic conduit shall be so made that the conduit will

not be damaged and that the internal diameter of the conduit will not be effectively

reduced.

III. Directions: Enumerate the 10 different types of conduit fittings. Use a separate sheet of

paper.

SELF – CHECK


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ANSWER KEYS


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REFERENCES

Johnston, Larry et.al., Better Homes and Gardens Wiring 1st Edition, Meredith Books;

2007,pp.

Mulin, R.C., Smith R.L. Electrical Wiring-Commercial, Six Ed., New York: Delmar’s

Publishing Inc.; 1984, pp.

Agpoa, Feleciano. Interior and Exterior Wiring Troubleshooting ; National Bookstore: 1991


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For inquiries or feedback, please write or call: Department of Education: DepEd-Cebu Province Office Address : IPHO Bldg., Sudlon, Lahug, Cebu City, Philippines Telefax : (032) 520-3216 – 520-3217; SDS Office: (032) 255 - 6405 E-mail Address : [email protected] Bitoon National Vocational High School Office Address : Bitoon, Dumanjug, Cebu Telefax : (032) 471-8001 E-mail Address : [email protected] :


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